Ok this is the second season in the series that I absolutly love. I think the same about this as I did the first series to be quite honest. To save yourself some time go and read my review on the first season of this anime.
Now to point out the differences in this season:
There was one annoying point in this series that wasn't true in the first season. Seito becomes a lot more of a letch in this season. He is checking out all the chicks and getting himself into hot water with Louis. This is the reason that I actually marked this Story as a 9. He is suddenly out of character from the first season. The story in the first half of this season seemed a little slow, but the second half definatly picks up there. DEFINATLY worth checking out if you enjoyed the first season.. If you didn't then go back and watch season 1 again.